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公开(公告)号：US20220374561A1
公开(公告)日：2022-11-24
申请号：US17871897
申请日：2022-07-23
发明人： Guangjian Dong , Yingjie Chen , Jianhong Fu , Kanhua Su , Qiang Han
IPC分类号： G06F30/17 , E21B10/43 , E21B10/14 , E21B10/567 , E21B49/00
摘要： The invention discloses a drill bit design method based on rock crushing principle with local variable strength, including: drill bit is divided into local crushing feature regions; strength mode factors of the local crushing feature regions are calculated; a difference among strength mode factors of the local crushing feature regions is obtained to obtain a vector sum of horizontal cutting forces of the drill bit tooth corresponding to the same group of cutting tooth on the drill bit; treating the difference among the strength mode factors of the local crushing feature region as a target control condition for drill bit design. Based on the rock crushing principle with local variable strength, after dividing the symmetrical cutting tooth into groups, the strength variation factors of the symmetrical position are adjusted and balanced, so that the rock crushing strength of different local crushing feature regions can be changed in a targeted manner.
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公开(公告)号：US10995557B2
公开(公告)日：2021-05-04
申请号：US16605301
申请日：2017-08-17
摘要： A method of manufacturing, assembling, configuring, and/or using a hybrid drill bit is disclosed. An illustrative example includes inserting a rolling cutting structure into a central bore of a bit body through an upper connector section of the bit body toward a lower end portion of the bit body. The bit body has a rotational axis and a plurality of blades at the lower end portion. The upper connector section is configured to be coupled to a lower end of a drill string. Each of the plurality of blades extends radially from the bit body about the rotational axis at the lower end portion and includes a plurality of cutters embedded therein.
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公开(公告)号：US10988988B2
公开(公告)日：2021-04-27
申请号：US16885460
申请日：2020-05-28
摘要： Drill bits and methods relating thereto are disclosed. In an embodiment, the drill bit includes a body having a plurality of legs each having a lower section that has a leading surface and a trailing surface. A plurality of cone cutters are each rotatably mounted to the lower section of one of the legs, each having a cone axis, and including a first plurality of cutter elements arranged about the cone axis such that each is shear the formation when the body is rotated about the bit axis.
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公开(公告)号：US10907414B2
公开(公告)日：2021-02-02
申请号：US15807853
申请日：2017-11-09
发明人： William Schoen
摘要： An earth-boring tool includes a body, a plurality of blades attached to the body and extending at least to a nose region of the earth-boring tool, a first rotatable cutting structure assembly coupled to the body, and a second rotatable cutting structure assembly coupled to the body. The first rotatable cutting structure assembly includes a first leg and a first rotatable cutting structure rotatably coupled to the first leg. A first cutting profile of the first rotatable cutting structure extends at least from a gage region of the earth-boring tool and at least partially through a cone region of the earth-boring tool. The second rotatable cutting structure assembly includes a second leg and a second rotatable cutting structure rotatably coupled to the second leg. A second cutting profile of the second rotatable cutting structure extends only from the gage region of the earth-boring tool and to an innermost boundary of a nose region of the earth-boring tool.
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公开(公告)号：US10704330B2
公开(公告)日：2020-07-07
申请号：US15039622
申请日：2014-12-05
摘要： Drill bits and methods relating thereto are disclosed. In an embodiment, the drill bit includes a body having a plurality of legs each having a lower section that has a leading surface and a trailing surface. A plurality of cone cutters are each rotatably mounted to the lower section of one of the legs, each having a cone axis, and including a first plurality of cutter elements arranged about the cone axis such that each is shear the formation when the body is rotated about the bit axis.
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6.发明申请公开(公告)号：US20190352970A1
公开(公告)日：2019-11-21
申请号：US15983639
申请日：2018-05-18
摘要： An earth-boring tool includes a body, at least one blade, and at least one rotatable cutting structure. The blade extends axially from the body and extends radially outward from a center longitudinal axis of the earth-boring tool to less than an outer diameter of the earth-boring tool. The blade defines a first cutting profile. The at least one rotatable cutting structure assembly is coupled to the body and includes a leg extending axially from the body and a rotatable cutting structure rotatably coupled to the leg. The rotatable cutting structure defines a second cutting profile extending to the outer diameter of the earth-boring tool. The first cutting profile overlaps with the second cutting profile in a radial direction in an amount that is less than 20% of the outer diameter of the earth-boring tool. A method of making an earth-boring tool.
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公开(公告)号：US10352101B2
公开(公告)日：2019-07-16
申请号：US14766509
申请日：2014-02-06
申请人： Liyuan Yang
发明人： Liyuan Yang
IPC分类号： E21B10/14 , E21B10/42 , E21B10/43 , E21B10/10 , E21B10/50 , E21B10/54 , E21B10/46 , E21B10/52 , E21B10/55
摘要： A composite drill bit has one or more scraping-wheel cutting units disposed on fixed-blade. The drill bit comprises a bit body, fixed-blades, and scraping-wheels. The angular deflection of the scraping-wheel is in the range of 20°≤|α|≤90°. The scraping-wheel cutting unit has a scraping-wheel shaft and a scraping-wheel with cutters disposed thereon. The scraping-wheel cutting unit is disposed on the fixed-blade by a rotary connection.
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公开(公告)号：US10072462B2
公开(公告)日：2018-09-11
申请号：US15097539
申请日：2016-04-13
发明人： Anton F. Zahradnik , Rudolf C. Pessier , Mitchell A. Rothe , Don Q. Nguyen , Karlos Cepeda , Michael S. Damschen , Robert J. Buske , Johnathan Howard , John F. Bradford , Gregory C. Prevost , Chaitanya K. Vempati
IPC分类号： E21B10/08 , E21B10/14 , E21B7/00 , E21B10/16 , E21B10/18 , E21B10/22 , E21B10/28 , E21B10/52 , E21B10/26 , E21B10/55
CPC分类号： E21B10/14 , E21B7/00 , E21B10/16 , E21B10/18 , E21B10/22 , E21B10/26 , E21B10/28 , E21B10/52 , E21B10/55
摘要： An earth-boring drill bit is described, the bit having a bit body having a central longitudinal axis that defines an axial center of the bit body and configured at its upper extent for connection into a drill string; at least one primary fixed blade extending downwardly from the bit body and inwardly toward, but not proximate to, the central axis of the drill bit; at least one secondary fixed blade extending radially outward from proximate the central axis of the drill bit; a plurality of fixed cutting elements secured to the primary and secondary fixed blades; at least one bit leg secured to the bit body; and a rolling cutter mounted for rotation on the bit leg; wherein the fixed cutting elements on at least one fixed blade extend from a center of the bit outward toward a gage region of the bit but do not include a gage cutting region, and wherein at least one roller cone cutter portion extends from substantially the drill bit's gage region inwardly toward the center of the bit, an apex of the roller cone cutter being proximate to the terminal end of the at least one secondary fixed blade, but does not extend to the center of the bit.
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公开(公告)号：US20180202231A1
公开(公告)日：2018-07-19
申请号：US15741190
申请日：2015-07-17
摘要： A hybrid drill bit includes both fixed cutting elements and rotational cutting elements thereon. The fixed cutting elements are affixed to a bit body and define a peripherally-located fixed cutting structure disposed radially outward of the rotational cutting elements. The rotational cutting elements define a centrally-located counter-rotational cutting structure including two hemispherical counter-rotational cutting members mounted for counter-rotation with respect to one another on an axis generally perpendicular to a bit body rotational axis.
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公开(公告)号：US09982488B2
公开(公告)日：2018-05-29
申请号：US15409301
申请日：2017-01-18
发明人： Ajay V. Kulkarni
摘要： A hybrid-type earth boring drill bit is described having fixed cutting blades and rolling cones with cutting elements, wherein the rolling cones are associated with a spindle assembly that may be optionally divorced from the head pin assembly, and which includes bearing members that further include a plurality of polycrystalline diamond elements.
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